# 导入string模块 
import string  
  
# 获取所有大写和小写字母  
uppercase_l = string.ascii_uppercase  
lowercase_l = string.ascii_lowercase  
  

letter_pairs = [(u, l) for u, l in zip(uppercase_l, lowercase_l)]  
  
for pair in letter_pairs:  
    print(f"{pair[0]} - {pair[1]}")